Research on the prediction method of cross-point information for the radiometric calibration of infrared spectral optical camera

Xuan Chen; Chenghua Cao; Wei Tan

doi:10.1117/12.2625875

27 March 2022 Research on the prediction method of cross-point information for the radiometric calibration of infrared spectral optical camera

Xuan Chen, Chenghua Cao, Wei Tan

Author Affiliations +

Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 12169AF (2022) https://doi.org/10.1117/12.2625875
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China

Abstract

On-orbit radiometric calibration is the premise of infrared spectral remote sensing camera imaging, and the prediction of cross-point information is the primary work of calibration. The imaging time and the longitude and latitude of the sub-satellite point of two satellites at cross-point can be predicted with the orbital elements of satellites to be calibrated and the ground reference targets. The orbit prediction method and the joint observation constraints, including the time interval constraints and the angle difference constraints, as well as the number of ground reference targets, are briefly introduced, an on-orbit radiometric calibration intersection information prediction method based on SGP4 analytical orbit model is proposed, combining the existing satellite orbit analysis software and real satellite camera observation data, the accuracy and feasibility of the prediction method are verified. Meanwhile, aiming at the requirement of 0.2K uncertainty transfer analysis for the consistency transfer calibration of space radiation reference for infrared spectral camera, the frequency analysis of cross-points is carried out, and the analysis selects Landsat8, TERRA, sentinel2A, etc. as the radiation reference satellites, and HJ-1A, HJ-2A, HJ-2B as the satellites to be calibrated. The cross-point information prediction method can serve the cross-calibration of on-orbit optical cameras and could provide technical supports for on-orbit radiometric calibration and satellite orbit design of high frequency and high precision optical cameras in China.

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Xuan Chen, Chenghua Cao, and Wei Tan "Research on the prediction method of cross-point information for the radiometric calibration of infrared spectral optical camera", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 12169AF (27 March 2022); https://doi.org/10.1117/12.2625875

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KEYWORDS

Calibration

Satellites

Ground-based vicarious calibration of satellites

Cameras

Earth observing sensors

Infrared cameras

Infrared radiation

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